GeForce GTX 965M vs Radeon HD 7970

Intro

Compare all of that to the Radeon HD 7970, which comes with a core clock speed of 925 MHz and a GDDR5 memory speed of 1375 MHz. It also makes use of a 384-bit bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7970		8225 points
GeForce GTX 965M		5650 points
	Difference: 2575 (46%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 7970		250 Watts
	Difference: 190 Watts (317%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7970 will be 313% faster than the GeForce GTX 965M overall, due to its higher bandwidth. (explain)

Radeon HD 7970		264000 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 200000 (313%)

Texel Rate

The Radeon HD 7970 will be quite a bit (about 96%) more effective at AF than the GeForce GTX 965M. (explain)

Radeon HD 7970		118400 Mtexels/sec
GeForce GTX 965M		60416 Mtexels/sec
	Difference: 57984 (96%)

Pixel Rate

The GeForce GTX 965M is a bit (approximately 2%) better at full screen anti-aliasing than the Radeon HD 7970, and also able to handle higher resolutions more effectively. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 7970		29600 Mpixels/sec
	Difference: 608 (2%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.